GIMP

GIMP stands for GNU Image Manipulation Program. Started in the mid 1990s, it is a image editing suite in a similar vein to proprietary editors like Adobe Photoshop. ArchLinux has a large number of plugins and additional tools for GIMP in its repositories. Type

pacman -S gimp

to install GIMP. Additionally, to search for extra tools, plugins and addons for GIMP, you can type